1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.browsing.ui.model.modifiers;
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14 import org.simantics.browsing.ui.common.ErrorLogger;
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15 import org.simantics.browsing.ui.content.Labeler.Modifier;
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16 import org.simantics.databoard.Bindings;
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17 import org.simantics.db.ReadGraph;
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18 import org.simantics.db.RequestProcessor;
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19 import org.simantics.db.Session;
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20 import org.simantics.db.common.request.ReadRequest;
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21 import org.simantics.db.common.utils.Logger;
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22 import org.simantics.db.exception.DatabaseException;
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23 import org.simantics.db.layer0.variable.InputValidator;
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24 import org.simantics.db.layer0.variable.Variable;
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25 import org.simantics.db.layer0.variable.VariableWrite;
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26 import org.simantics.db.layer0.variable.Variables;
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27 import org.simantics.scl.runtime.function.Function1;
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28 import org.simantics.utils.datastructures.Callback;
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31 * @author Tuukka Lehtonen
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33 public class VariableModifier2 implements Modifier {
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35 final protected Session session;
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36 final protected Variable variable;
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38 private String initialValue;
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39 protected Throwable modifierFailed;
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40 protected InputValidator variableInputValidator;
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42 public VariableModifier2(RequestProcessor processor, Variable variable) {
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43 this.variable = variable;
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44 this.session = processor.getSession();
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45 initializeModifier(processor);
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48 protected void initializeModifier(RequestProcessor processor) {
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52 processor.syncRequest(new ReadRequest() {
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54 public void run(ReadGraph graph) throws DatabaseException {
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55 initialValue = getInitialValue(graph);
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56 initializeValidator(graph, variable);
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60 } catch (DatabaseException e) {
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61 Logger.defaultLogError("Modifier initialization failed, see exception for details.", e);
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67 protected void initializeValidator(ReadGraph graph, Variable var) throws DatabaseException {
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69 // Resource validator = variable.getPossiblePropertyValue(graph, Variables.INPUT_VALIDATOR);
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70 // if(validator != null) {
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71 // variableInputValidator = graph.getPossibleContextualAdapter(validator, variable, Variable.class, InputValidator.class);
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74 final Function1<String, String> validator = variable.getPossiblePropertyValue(graph, Variables.INPUT_VALIDATOR);
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75 if (validator != null)
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76 variableInputValidator = new InputValidator() {
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79 public String isValid(Object newValue) {
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80 return validator.apply((String)newValue);
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87 protected void doModify(final String label) {
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88 session.asyncRequest(new VariableWrite(variable, label), new Callback<DatabaseException>() {
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90 public void run(DatabaseException parameter) {
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91 if (parameter != null)
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92 ErrorLogger.defaultLogError(parameter);
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99 protected void modifySuccessful() {
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102 protected String getInitialValue(ReadGraph graph) throws DatabaseException {
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103 return variable.getValue(graph, Bindings.STRING);
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107 public String getValue() {
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108 return initialValue;
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112 public String isValid(String label) {
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114 if (modifierFailed != null)
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115 return "Could not resolve validator for this value, modification denied. Reason: " + modifierFailed.getMessage();
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117 if (variableInputValidator != null)
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118 return variableInputValidator.isValid(label);
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125 public final void modify(String label) {
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126 if (modifierFailed != null)
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127 // Should never end up here, isValid should prevent it.
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128 throw new Error("modifier failed: " + modifierFailed.getMessage());
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